How to exclude DC in sinad caluculation

Hi 

I am using Sinad Analyzer VI for caluculating SINAD for my ADC data. I wanted to exclude the DC from FFT while calculating SINAD (ie exclude first point of FFT).  How could I do using SINAD analyzer VI? I am not seeing any option to set that. But when checked inside the VI mask I found options to turn it ON and OFF. Since its a built in fuction of labview I could not able to change the code. Is there any way to do it? or If I can do the same thing in some other way please help me. 

thank you,